Megasquirt Newbie Questions - All the really dumb ones you were afraid to ask!

Question, I'm getting confused in tuning the warm up /afterstart, the cars feels lumpy and restrictive at cold start, think my afrs on this are around 12,but when driving , its pulling back ,feels like misfiring, ,buy when out of warm up , its ok. Tried looking into afterstart as same thing happens after short runs , starting engine , stopping ect,I'm guessing afterstart plays a part here,just dont know how much or where to adjust these warm up areas,

 

Thats not afterstart. That will be your cold acceleration. Your afterstart is only when the cranking has finished, Usally last for a short period like 6 secs. You would adjust that if after cranking it has trouble keeping riunning initially untill warmup kicks in.

If the fuelling is too rich. Any extra added fuel from AE can bog engine down i found

 

Excellent,afterstart is ok on that part. Looked at warm-up bins on TS, having a graph made it easier as the whole warm-up cycle was spiking everywhere,at one point towards the end it ramped up ,I slopped the thing down and seems ok

 

At what point can I drive my car ? I just need to get it to my garage, 1 minute away so that I can work on it when it's ****ing it down1 like now, driving me mad! I'm guessing after ive done cold idle warm idle afterstart etc etc.

 

It's up to you. If it runs, drive it sensibly. The base map should work well enough for that.

 

Ok sweet, my lc-1's being a nightmare, its giving out 4.7 v even though it is running mega rich, logworks gauge reads at 21-22 afr.

 

If it's been calibrated properly. You may be very lean like the reading is showing.

 

mmm, could I just put required up fuel up a bit too see if that lowers my afr's? It's reading 4.7 volts, so nearly max reading.

 

Have you calibrated it in free air? Instruments are supposed to be believed if they are calibrated correctly. Have you datalogged it yet?

 

Yer I've done it when it first connected up, then when in the exhaust and giving me mega high readings I took it out and recalibrated it.

I've done a few datalogs yer, would they give me correct readings then? I've got them saved so can go look at them.

 

You need to see if the afr reading changes when datalogging to make sure its connected/configured right. Then go from there to see if fuelling is right. If the signal is flatlining its it could be disconnected.

 

I'm running mega squirt on my standard ABF engine with the standard fuel rail, all the wiring diagrams i have seen show that there is two 12v power wires for two injectors with a 5amp fuse each. The issue i have is that for the standard fuel rail there is 5 wires 4 for the injectors and 1 12v power, ive opened up the fuel rail and there is not really enough room to install some fuses.

I was wondering if i can just run a single fuse for all four injectors? Would this be safe and if so what amp's?

 

You're more likely to blow injector drivers in the ECU. Better to split the wiring in the fuel rail, run it back to the fusebox and install fuses inside the car.

 

Check the spark plugs. If it's mega rich they'll be jet black. Sometimes a car running v lean can confuse the probe due to unburnt fuel in the exhaust.

Old school methods are often good to double check fancy new kit!

 

That problem is not around now, fixed it by getting an abf running ms2 all set up and ready to go lol

 

Just noticed the date on that post

 

Bump for G60KG

 

Dumb question - what gauge / spec are the wires used in the MS loom? I need to put in a load of extensions to pick-up sensors on the other side of the engine bay.

 

What loom do you have? i.e. DIYAutotune, RSA, homemade?

 

Looks like a DIY effort.

I've actually just bought a new DB37 connector with pin type fittings, so have an opportunity to start from.fresh with wiring

Any suggestions on what wiring spec to buy much appreciated.